9th November 2021

A 28-year-old female presents to her general practitioner (GP) after feeling numbness and increased weakness in both arms for the past 2 days

A 28-year-old female presents to her general practitioner (GP) after feeling numbness and increased weakness in both arms for the past 2 days. She has previously had a similar episode a few months ago, though it was her legs that were affected then, not her arms. There is no significant past medical history. On examination, neck flexion results in reduced strength in the arms.

Which of the following is the most appropriate investigation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.